B7K9 fixes all the problems with Taiyo Yuden YUDEN000T02 8x DVD+R media. It burns at 16x with excellent results now, instead of having serious quality problems at the end of the disc like it did sometimes on B7J9. TYG02 still only burns at 12x for me, but the quality is good (not GREAT though) and the burn doesn't start pausing halfway through for no reason anymore.